Markus F. Transistor Checker

Documents:
Schematic and Description
Schematic (1 page)

This is a slightly alternate design to the Markus F. Transistor Checker.

This device can identify transistor types (BJT, MOSFET, JFET) and pin outs. It also supports diode, thyristors, triacs, resistor, and capacitor identification. In short, this is a great little project for identifying poorly labeled parts, salvaging expensive parts, and testing problematic parts.

I added a small breakout board for the alligator clips since my 3 pin socket partially melted while soldering. With the metal tape doing a fan out pattern, many different sizes can quickly be accommodated.